<!DOCTYPE html>
<html lang="zh">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./css/reset.css">
    <style>
        body {
            background-color: #000;
        }

        .box {
            height: 400px;
            width: 400px;
            border: 8px solid rgb(94, 91, 87);
            border-radius: 8px;
            margin: 200px auto 0;
            padding: 20px;
        }
        .box{
            display: flex;
            justify-content: flex-end;
            align-items: flex-end;
        }

        .item {
            background-color: white;
            border-radius: 80px;
            height: 100px;
            width: 100px;
        }
    </style>
</head>

<body>
    <div class="box">
        <span class="item"> </span>
    </div>
</body>

</html>